Israel documents: South African general says country should get nukes on Jericho missiles. Photograph: guardian.co.uk

This is the secret memo by South Africa's military chief of staff, General RF Armstrong, asking for nukes on the Jericho missiles. It has been revealed before, but its context was not understood. We now know the memo was the direct result of a meeting between PW Botha and Shimon Peres, and the basis of Botha's demand for nukes. This memo was uncovered by Peter Liberman and published in the Nonproliferation Review.

This cover page of an ISSA (ISrael-South Africa agreement) meeting in Pretoria between Israeli and South African officials on 30 June 1975 establishes the presence of General Armstrong, who wrote the nuclear memo.

Israel documents: Page 2 states existence of agreement with South Africa is secret. Photograph: guardian.co.uk

This is the cover page and two other pages from the secret military agreement between Israel and South Africa, signed by both Shimon Peres and Botha. Note on page two there is a clause that says the very existence of the agreement is secret. Both men have signed the agreement on page three.